utils: add osmo_is_hexstr(), add unit test
Will be used by OsmoHLR to validate VTY and CTRL input.
Change-Id: Idf75946eb0a84e145adad13fc7c78bb7a267aa0a
diff --git a/include/osmocom/core/utils.h b/include/osmocom/core/utils.h
index 855e653..5f41213 100644
--- a/include/osmocom/core/utils.h
+++ b/include/osmocom/core/utils.h
@@ -1,5 +1,7 @@
#pragma once
+#include <stdbool.h>
+
#include <osmocom/core/backtrace.h>
#include <osmocom/core/talloc.h>
@@ -89,4 +91,7 @@
size_t osmo_strlcpy(char *dst, const char *src, size_t siz);
+bool osmo_is_hexstr(const char *str, int min_digits, int max_digits,
+ bool require_even);
+
/*! @} */